Dropbox also has CLI. If that was the only way to access dropbox, average consumer would be out of luck too. GnuPG has a ton of frontends. I can do three click

Dropbox also has CLI. If that was the only way to access dropbox, average consumer would be out of luck too. GnuPG has a ton of frontends. I can do three clicks in gajim and have chat secured by GnuPG. Or manage keys with some system keyring app like seahorse (https://wiki.debian.org/Seahorse https://wiki.debian.org/Seahorse), or whatever. The problem is only education. Dropbox just pays a ton of money to put their solution in front of people's eyes via ads, and whatever. GnuPG obviously does not do that on the same level. Also securing your communication via asymmetric cryptography requires a bit more understanding and data hygiene than uploading a file somewhere. So it will be an uphill battle regardless of the UI.